5646081866 has 16 divisors (see below), whose sum is σ = 8536540320. Its totient is φ = 2800599600.

The previous prime is 5646081841. The next prime is 5646081907. The reversal of 5646081866 is 6681806465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 396380 + ... + 410376.

It is an arithmetic number, because the mean of its divisors is an integer number (533533770).

Almost surely, 2^5646081866 is an apocalyptic number.

5646081866 is a deficient number, since it is larger than the sum of its proper divisors (2890458454).

5646081866 is a wasteful number, since it uses less digits than its factorization.

5646081866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15589.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The square root of 5646081866 is about 75140.4143321023. The cubic root of 5646081866 is about 1780.6656881847.

The spelling of 5646081866 in words is "five billion, six hundred forty-six million, eighty-one thousand, eight hundred sixty-six".